Question

what chromosomal anomaly occurs during meiosis when chromatids fail to separate?
nonduplication
nondisjunction
nondivision
nonalignment

Explanation:

To solve this, we analyze each option:

• "nonduplication" refers to not duplicating, not related to chromatid separation.
• "nondisjunction" is the failure of chromatids (or chromosomes) to separate during cell division (like meiosis), which matches the question.
• "nondivision" means not dividing, not about separation failure.
• "nonalignment" is about not aligning, not separation.

Answer:

B. nondisjunction